/*
* @version: 2.0
* @Author:  tomato
* @Date:    2018-5-5 11:29:57
* @Last Modified by:   tomato
* @Last Modified time: 2018-5-26 18:08:43
*/
//多选下拉框
layui.define(['jquery', 'layer'], function(exports){
    var MOD_NAME = 'selectM';
    var $ = layui.jquery,layer=layui.layer;
    var obj = function(config){
        this.disabledIndex =[];
        //当前选中的值名数据
        this.selected = [];
        //当前选中的值
        this.values =[];
        //当前选中的名称
        this.names =[];

        //初始化设置参数
        this.config = {
            //选择器id或class
            elem: '',
            //候选项数据[{id:"1",name:"名称1",status:0},{id:"2",name:"名称2",status:1}]
            data: [],

            //默认选中值
            selected: [],

            //空值项提示，支持将{max}替换为max
            tips: '请选择',

            //最多选中个数，默认5
            max : 5,

            //选择框宽度
            width:null,

            //值验证，与lay-verify一致
            verify: '',

            //input的name 不设置与选择器相同(去#.)
            name: '',

            //值的分隔符
            delimiter: ',',

            //候选项数据的键名 status=0为禁用状态
            field: {idName:'id',titleName:'name',statusName:'status'}
        }

        this.config = $.extend(this.config,config);
        //创建选项元素
        this.createOption = function(){
            var o=this,c=o.config,f=c.field,d = c.data;
            var s = c.selected;
            $E = $(c.elem);
            var tips = c.tips.replace('{max}',c.max);
            var inputName = c.name=='' ? c.elem.replace('#','').replace('.','') : c.name;
            var verify = c.verify=='' ? '' : 'lay-verify="'+c.verify+'" ';
            var html = '';
            html +=	'<div class="layui-unselect layui-form-select">';
            html +=			'<div class="layui-select-title">';
            html +=				'<input '+verify+'name="'+inputName+'" type="text" readonly="" class="layui-input layui-unselect">';
            html +=			'</div>';
            html +=			'<div class="layui-input multiple" style="min-height: 38px">';
            html +=			'</div>';
            html +=			'<dl class="layui-anim layui-anim-upbit">';
            html +=				'<dd lay-value="" class="layui-select-tips">'+tips+'</dd>';
            for(var i=0;i<d.length;i++){
                var disabled1='',disabled2='';
                if(d[i][f.statusName]==0){
                    o.disabledIndex[d[i][f.idName]] = d[i][f.titleName];
                    disabled1 = d[i][f.statusName]==0 ? 'layui-disabled' : '';
                    disabled2 = d[i][f.statusName]==0 ? ' layui-checkbox-disbaled layui-disabled' : '';
                }
                html +='<dd lay-value="'+d[i][f.idName]+'" class="'+disabled1+'">';
                html +=		'<div class="layui-unselect layui-form-checkbox'+disabled2+'" lay-skin="primary">';
                html +=			'<span>'+d[i][f.titleName]+'</span><i class="layui-icon">&#xe605;</i>';
                html +=		'</div>';
                html +='</dd>';
            }
            html +=			'</dl>';
            html +=		'</div>';
            $E.html(html);
        }

        //设置选中值
        this.set = function(selected){
            var o=this,c=o.config;
            var s = typeof selected=='undefined' ? c.selected : selected;
            $E = $(c.elem);
            $E.find('.layui-form-checkbox').removeClass('layui-form-checked');
            $E.find('dd').removeClass('layui-this');
            //为默认选中值添加类名
            var max = s.length>c.max ? c.max : s.length;
            for(var i=0;i<max;i++){
                if(s[i] && !o.disabledIndex.hasOwnProperty(s[i])){
                    $E.find('dd[lay-value='+s[i]+']').addClass('layui-this');
                }
            }
            $E.find('dd.layui-this').each(function(){
                $(this).find('div').addClass('layui-form-checked');
            });
            o.setSelected(selected);
        }

        //设置选中值 每次点击操作后执行
        this.setSelected = function(first){
            var o=this,c=o.config,f=c.field;
            $E = $(c.elem);
            var values=[],names=[],selected = [],spans = [];
            var items = $E.find('dd.layui-this');
            if(items.length==0){
                var tips = c.tips.replace('{max}',c.max);
                spans.push('<span class="tips">'+tips+'</span>');
            }
            else{
                items.each(function(){
                    $this = $(this);
                    var item ={};
                    var v = $this.attr('lay-value');
                    var n = $this.find('span').text();
                    item[f.idName] = v;
                    item[f.titleName] = n;
                    values.push(v);
                    names.push(n);
                    spans.push('<a href="javascript:;"><span lay-value="'+v+'">'+n+'</span><i class="layui-icon">&#x1006;</i></a>');
                    selected.push(item);
                });
            }
            spans.push('<i class="layui-edge" style="pointer-events: none;"></i>');
            $E.find('.multiple').html(spans.join(''));
            $E.find('.layui-select-title').find('input').each(function(){
                if(typeof first=='undefined'){
                    this.defaultValue = values.join(c.delimiter);
                }
                this.value = values.join(c.delimiter);
            });

            var h = $E.find('.multiple').height()+14;
            $E.find('.layui-form-select dl').css('top',h+'px');
            o.values=values,o.names=names,o.selected = selected;
        }
        //ajax方式获取候选数据
        this.getData = function(url){
            var d;
            $.ajax({
                url:url,
                dataType:'json',
                async:false,
                success:function(json){
                    d=json;
                },
                error: function(){
                    console.error(MOD_NAME+' hint：候选数据ajax请求错误 ');
                    d = false;
                }
            });
            return d;
        }
    };
    //渲染一个实例
    obj.prototype.render = function(){
        var o=this,c=o.config,f=c.field;
        $E = $(c.elem);
        if($E.length==0){
            console.error(MOD_NAME+' hint：找不到容器 ' +c.elem);
            return false;
        }
        if(Object.prototype.toString.call(c.data)!='[object Array]'){
            var data = o.getData(c.data);
            if(data===false){
                console.error(MOD_NAME+' hint：缺少分类数据');
                return false;
            }
            o.config.data =  data;
        }

        //给容器添加一个类名
        $E.addClass('lay-ext-mulitsel');
        if(/^\d+$/.test(c.width)){
            $E.css('width',c.width+'px');
        }
        //添加专属的style
        if($('#lay-ext-mulitsel-style').length==0){
            var style = '.lay-ext-mulitsel .layui-form-select dl dd div{margin-top:0px!important;}.lay-ext-mulitsel .layui-form-select dl dd.layui-this{background-color:#fff}.lay-ext-mulitsel .layui-input.multiple{line-height:auto;height:auto;padding:4px 10px 4px 10px;overflow:hidden;min-height:38px;margin-top:-38px;left:0;z-index:99;position:relative;background:#fff;}.lay-ext-mulitsel .layui-input.multiple a{padding:2px 5px;background:#5FB878;border-radius:2px;color:#fff;display:block;line-height:20px;height:20px;margin:2px 5px 2px 0;float:left;}.lay-ext-mulitsel .layui-input.multiple a i{margin-left:4px;font-size:14px;} .lay-ext-mulitsel .layui-input.multiple a i:hover{background-color:#009E94;border-radius:2px;}.lay-ext-mulitsel .danger{border-color:#FF5722!important}.lay-ext-mulitsel .tips{pointer-events: none;position: absolute;left: 10px;top: 10px;color:#757575;}';
            $('<style id="lay-ext-mulitsel-style"></style>').text(style).appendTo($('head'));
        };

        //创建选项
        o.createOption();
        //设置选中值
        o.set();

        //展开/收起选项
        $E.on('click','.layui-select-title,.multiple,.multiple.layui-edge',function(e){
            //隐藏其他实例显示的弹层
            $('.lay-ext-mulitsel').not(c.elem).removeClass('layui-form-selected');
            if($(c.elem).is('.layui-form-selected')){
                $(c.elem).removeClass('layui-form-selected');

                $(document).off('click',mEvent);
            }
            else{
                $(c.elem).addClass('layui-form-selected');

                $(document).on('click',mEvent=function(e){
                    if(e.target.id!==c.elem && e.target.className!=='layui-input multiple'){
                        $(c.elem).removeClass('layui-form-selected');
                        $(document).off('click',mEvent);
                    }
                });
            }
        });

        //点击选项
        $E.on('click','dd',function(e){
            var _dd = $(this);
            if(_dd.hasClass('layui-disabled')){
                return false;
            }
            //点 请选择
            if(_dd.is('.layui-select-tips')){
                _dd.siblings().removeClass('layui-this');
                $(c.elem).find('.layui-form-checkbox').removeClass('layui-form-checked');
            }
            //取消选中
            else if(_dd.is('.layui-this')){
                _dd.removeClass('layui-this');
                _dd.find('.layui-form-checkbox').removeClass('layui-form-checked');
                e.stopPropagation();
            }
            //选中
            else{
                if(o.selected.length >= c.max){
                    $(c.elem+' .multiple').addClass('danger');
                    layer.tips('最多只能选择 '+c.max+' 个', c.elem+' .multiple', {
                        tips: 3,
                        time: 1000,
                        end:function(){
                            $(c.elem+' .multiple').removeClass('danger');
                        }
                    });
                    return false;
                }
                else{
                    _dd.addClass('layui-this');
                    _dd.find('.layui-form-checkbox').addClass('layui-form-checked');
                    e.stopPropagation();
                }
            }

            o.setSelected();
        });

        //删除选项
        $E.on('click','a i',function(e){
            var _this = $(this).prev('span');
            var v = _this.attr('lay-value');
            if(v){
                var _dd = $(c.elem).find('dd[lay-value='+v+']');
                _dd.removeClass('layui-this');
                _dd.find('.layui-form-checkbox').removeClass('layui-form-checked');
            }
            o.setSelected();
            _this.parent().remove();
            e.stopPropagation();

        });

        //验证失败样式
        $E.find('input').focus(function(){
            $(c.elem+' .multiple').addClass('danger');
            setTimeout(function(){
                $(c.elem+' .multiple').removeClass('danger');
            },3000);
        });
    }

    //输出模块
    exports(MOD_NAME, function (config) {
        var _this = new obj(config);
        _this.render();
        return _this;
    });
});